?Which UNIX flavors on VAX 11/730

[Mike Santangelo]

Hi there,
  Last summer I found myself the owner of an old VAX 11/730 system
(-ZA config, R80/RL02, and TS11 tape drive).  I am looking for a
cheap version of UNIX to run on it.  BSD4.2 and BSD4.3 did I know.
ULTRIX supposedly does.  Any others?  How about MACH?  Any suggestions?
(don't include things like throwing away or scrapping it, it is just
a toy, this is all it gets used as, personal amusement/basement
warmer & light(s) dimmer on power-up (esp. of R80)).

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Michael F. Santangelo                 + Inet: mike at uc780.umd.edu
VMS / UNIX Systems                    +       mike at socrates.umd.edu
Academic Computing UMUC               + Bnet: MIKE at UC780
(The University of Maryland,          +       MIKE at UMUC (not visited often)
 University College)                  +<Your clever net-phrase here>